光学双稳性的强迫振动模型

本文提出一个新的光学双稳性模型.基于平均场近似,慢变振幅近似和绝热近似的思想,把光学双稳系统看成一个“黑箱”,类比非线性振动理论,指出不同的光学双稳过程(包括不同的工作物质和不同的腔(F-P腔或环腔)),能用一个恰当的强迫振动方程统一地描述.方程中所包含的都是可测量的宏观参量,使得可能直接用实验拟合,与理论结果进行定量对照.用振动理论的方法,把方程演变成自治方程组,从而方便地得到光学双稳性稳态和动态解的一般形式.并用若干已报道的具体例子验证了这个模型的普适性.     

一类超W-代数权空间维数有限的不可约模

本文研究了一类超W-代数上某一权空间维数有限的不可约权模,证明了该权模必是Harish-Chandra模.     

用三轴转台测量激光导引发射、接收视场角数据处理问题的探讨

研究了最一般情形下用三轴转台测量激光导引发射、接收视场角数据的处理问题,由此得出一般情形下计算视场角的公式,并给出了较为详细的推导过程。现场调试结果表明:通过该公式进行数据处理后,所得测试结果更符合实际情形,测试精度得到较大提高。     

Biopolymer-assisted synthesis of yttrium oxide nanoparticles

Yttrium oxide nanopowder was prepared by a novel technique using an alginate biopolymer as a precursor. The technique is based on thermal decomposition of an yttrium alginate gel, which is produced in the form of beads by ionic gelation between the yttrium solution and sodium alginate. The effect of post-annealing temperature on the particle size of the nanocrystals was investigated at various tempera- tures. The products were characterized using X-ray diffraction, scanning electron microscopy, and atomic force microscopy. The size of the nanocrystalline Y2O3 particles varied from 22.7 to 38.7 nm, depending on the annealing temperature and time. The grain size distribution （GSD） was also determined. The GSD became more non-symmetrical as the annealing temperature increased, and the width of the distributions for the powders produced using the alginate method was less affected by heat treatment. This alginate method was compared with the conventional glycine combustion method, on the basis of particle size. The particles obtained using the proposed technique were smaller than those obtained using the combustion method. Alginate-assisted thermal decomposition is therefore an easy and cost-effective method for preparing nanosized Y2O3 crystals.     

Klein–Gordon and Dirac Equations with Thermodynamic Quantities

We study the thermodynamic quantities such as the Helmholtz free energy, the mean energy and the specific heat for both the Klein–Gordon, and Dirac equations. Our analyze includes two main subsections: (1) statistical functions for the Klein–Gordon equation with a linear potential having Lorentz vector, and Lorentz scalar parts (2) thermodynamic functions for the Dirac equation with a Lorentz scalar, inverse-linear potential by assuming that the scalar potential field is strong (A ? 1). We restrict ourselves to the case where only the positive part of the spectrum gives a contribution to the sum in partition function. We give the analytical results for high temperatures.     

Stability analysis of N-model systems under a static priority rule

We consider the stability of N-model systems that consist of two customer classes and two server pools. Servers in one of the pools can serve both classes, but those in the other pool can serve only one of the classes. The standard fluid models in general are not sufficient to establish the stability region of these systems under static priority policies. Therefore, we use a novel and a general approach to augment the fluid model equations based on induced Markov chains. Using this new approach, we establish the stability region of these systems under a static priority rule with thresholds when the service and interarrival times have phase-type distributions. We show that, in certain cases, the stability region depends on the distributions of the service and interarrival times (beyond their mean), on the number of servers in the system, and on the threshold value. We also show that it is possible to expand the stability region in these systems by increasing the variability of the service times (without changing their mean) while keeping the other parameters fixed. The extension of our results to parallel server systems and general service time distributions is also discussed.     

Analytical Solutions to the Klein-Gordon Equation with Position-Dependent Mass for q-Parameter P？schl-Teller Potential

The energy eigenvalues and the corresponding eigenfunctions of the one-dimensional Klein-Gordon equation with q-parameter P？schl-Teller potential are analytically obtained within the position-dependent mass formalism. The parametric generalization of the Nikiforov-Uvarov method is used in the calculations by choosing a mass distribution.     

Synthesis,spectroscopy, and quantum-chemical calculations on 1-substituted phenyl-3,5-diphenylformazans

In this study 1-substituted phenyl-3,5-diphenylformazans were synthesized from benzaldehyde-N-phenylhydrazone and appropriate phenyldiazonium salts having CH₃, Br, and Cl at the o-, m-, and p-positions of 1-phenyl ring. Their structures were determined by infrared and ultraviolet–visible spectra. Bathochromic effect in accordance with the electron-donating effect of CH₃, Br, and Cl group and its magnitude were dependent upon type and position of substituent on the ring. The ground-state geometries and absorption wavelengths for 1-phenyl substituted formazans were studied with density functional theory and time-dependent density functional theory. The calculations were carried out by using PBE1PBE functional with 6-311G(2d,2p) basis set for λ_max of the UV–vis spectra for the studied formazans. A good agreement was obtained between the experimental and computed values.     

微流控芯片光学检测技术在细胞研究中的应用与进展

重点综述了芯片上细胞培养和实时检测的微系统研究及相应检测方法和技术近年来的进展.总结了多种光学检测方法和技术体系的优缺点及发展趋势,讨论了各种方法技术对细胞研究模型的研究适用范围,探讨各种检测方法和技术对活细胞、单细胞实时无损无标记检测和传感发展前景和研究进展.最后对整个芯片实验室框架下细胞研究及传感微系统的发展方向进行了有益的思路和方法展望.